Are the users connecting from the same site? If so, many routers will only allow one pass-through VPN connection at a time. This is at the client site.
Usually if you want multiple users to connect from one site, you establish a site-to-site VPN using VPN routers.

As Wi-Fi growth and popularity continues to climb, not everyone understands the risks that come with connecting to public Wi-Fi or even offering Wi-Fi to employees, visitors and guests. Download the resource kit to make sure your safe wherever business takes you!